>>212358350
The pace and direction of the show is insane, especially in the 2nd season. Because it is not an adaptation of something and an anime original, thing go a mile a minute. It's taking all the fat you'd associate with a long running shonen anime and cutting that away. This is more explicit in the 2nd season when a new generation of mech is introduced every other episode. But even the first season is just taking a high concept of a guy who has the powers to mind control people to a limited extent and using that to wage war on a nation. So frenetic pace + high concept + perfect ending = something that stayed with people for a long time.